FR3051718A1 - DEVICE AND METHOD FOR MAINTAINING / TRANSPORTING SUBSTRATES IN A PRINTING MACHINE - Google Patents

Abstract

The object of the present invention is to provide a new device and a novel method for accurately transporting printable substrates suitable for substrates of various types, sizes and thicknesses. In addition, the invention is suitable for printing machines without contact with the substrate, such as inkjet printing machines.

Description

Device and method for holding / transporting substrates in a printing machine

The present invention relates to the field of printing, in particular in the field of digital printing without contact with substrates, and more particularly to a device and a method for maintaining printable and printed substrates during their treatment in a set of processing stations included in a printing machine, said device and / or method of maintaining the substrates being made to allow printing under optimal conditions. The present invention also makes it possible to transport printable and printed substrates on all of the processing stations included in a printing machine, the transport of the substrates being carried out so as to allow their printing under optimal conditions.

INTRODUCTION

Maintaining and / or transporting substrates using automated processing or industrial manufacturing is a particular technical challenge. Part of the difficulty lies in the maintenance / displacement of a substrate along a chain comprising several treatments of said substrate, in particular for its maintenance during two consecutive treatments and / or its displacement from a station of treatment to the next treatment station during the manufacturing / finishing process of the final substrate. Any device for treating a substrate, and more particularly any device for digitally processing a substrate, can advantageously benefit from the advantages of the present invention. As a purely illustrative and nonlimiting example, the device for treating a substrate is selected from laser cutting, finishing, drying, punching, cutting, folding and / or in particular printing devices, particular digital inkjet printing.

This technical challenge of maintaining / transporting the substrate is even more exacerbated when combining, within the same machine, different types of printing and / or different types of drying. As a purely illustrative and non-limiting example, mention may be made of conventional ink printing (mono or polychromic), and / or varnish, and / or printed electronics, and / or drying with, for example, an infrared drying oven. (IR) and / or near-infrared (NIR) and / or heated airflow, and / or ultraviolet (UV) and / or light-emitting diode (UV) LED drying and / or photonic process. Indeed, the combination of several modes of printing and various treatments within the same machine requires a mode of maintenance / transport of high precision (for example to meet the requirements of the printed electronics), as well as a maintaining / transport whose components do not interfere with the efficiency requirements of each of the printing and processing stations individually and / or in combination; for example, the negative impact that a treatment station may have on the treatment station that follows it and / or on the treatment station that precedes it in the machine, for example along the transport path (for example to prevent a drying station from affecting the performance of a print station). In addition, the implementation must be such that it makes it possible to maintain and / or route the substrates of various sizes between all the processing stations in the best possible way while meeting the requirements related to the different speeds of each of the stations of treatments and manufacturing rates sufficient to allow efficient and cost-effective industrial application.

PRIOR ART

It is known from the prior art, holders / transport printable substrates made by suction belts, whose function is to maintain a substrate against said belts moving. This type of solution, well known to those skilled in the art, nevertheless has some disadvantages. In particular, this type of device, causing air movements and pressure gradients, can cause the deformation of the substrates if they are large. The accuracy of printing will therefore be affected. On the other hand, the use of these suction belts with some widely used printing technologies, such as inkjet printing, can cause accidental suction of ink in the print heads and defuse the printheads. This type of incident requires at best a reboot of the heads, and in the worst case a replacement of defused heads, become unusable.

To overcome these problems, in particular to allow the displacement of substrates in a precise manner, there are in the prior art techniques using cylinders having a plurality of grippers gripping the substrates by the leading edge relative to the direction of displacement of the substrate. Suitable for inkjet type printing machines, this type of solution nevertheless has several disadvantages. Indeed, this system requires an arrangement of all orbital inkjet heads around a large cylinder. In addition, this type of system raises the problem of the difficulty of adjusting the position of the printheads. Indeed, for a quality printing, the ink ejected from the print heads must form a jet whose direction is perpendicular to the surface of the substrate. It is understood in this case that the use of a cylinder for transporting and tensioning the substrate, whose surface is by definition not flat, imposes tedious adjustments of the position of the printing heads. For the same reason, it is difficult to use substrates of variable thickness, the change of substrate imposing an adjustment of all the print heads. On the other hand, the printing pitch, that is to say the position of the clamps on the cylinder, is fixed, which means that the print rate remains the same regardless of the size of the substrate.

It is also known in the prior art of substrate transport systems using chains or conveyors on which clamps are arranged to grip the substrates and transport them on a transport path of which a portion is flat, which solves the problem of the layout of the print heads. However, this type of solution still has the problem of a fixed printing step, which imposes a fixed rate and, in this case, poses the additional problem of not allowing to use substrates of different sizes without stopping the printing and make a tedious adjustment of the position of the clamps.

More recently, the Applicant has proposed in its patent application WO20I3156540 a device and a method for transporting printable substrates accurately, suitable for substrates of various types, sizes and thicknesses, and for making variable pitch prints. There is disclosed a substrate transport system in a printing machine, along a transport path oriented along a longitudinal axis from at least one input magazine providing the printable substrates, to at least one magazine output terminal receiving the substrates, characterized in that it comprises: movable gripping means, each comprising an opening / closing system ensuring the release or gripping of a substrate. said gripping means comprising front and rear gripping means, each grasping a portion, respectively, front and rear of the substrate along the transport path, guiding means for guiding the gripping means along the transport path, least one means of motorization ensuring a displacement of the gripping means along the guide means, preferably with an independent displacement between at least the front gripping means and the rear gripping means, the substrate transport system being thus adapted to grasping each substrate so as to tension and move substrates, even if they have variable lengths, along the conveying path, the guide means, the gripping means and their associated openRead / closure system being controlled by means of computer resources.

Although the device and method of WO2013156540 already satisfactorily meet the needs of those skilled in the art, the Applicant has now developed a device and a method which make it possible to improve the maintenance / transport of printable substrates and / or printed on all processing stations included in a printing machine, particularly a printing machine without contact with the substrate, such as ink jet printing machines. INVENTION - introduction

The present invention thus provides a novel device and method for maintaining and preferably transporting accurately printable and printed substrates suitable for substrates of various types, sizes and thicknesses. In particular, the invention makes it possible to produce variable pitch prints. In addition, the present invention is suitable for printing machines without contact with the substrate, such as inkjet printing machines and, more particularly, printing machines which make it possible to combine, within the same machine. , different types of printing and / or different types of drying and / or different types of pretreatments and / or different types of post-treatments (or finishes) such as, for illustrative and not limiting purposes, contactless prints conventional inks (black, white, mono or polychrome), and / or varnish, and / or inks adapted to the printed electronics, and / or inks suitable for printing in three dimensions and / or d various inks such as functional inks and / or insulating inks (eg insulating inks used downstream of ink printing for printed electronics); and / or drying with, for example, an infra-red (IR) and / or near-infrared (NIR) and / or heated-air drying oven, and / or ultraviolet (UV) lamp drying and / or light-emitting diode (LED) UV and / or a photonic process; and / or pretreatment such as, for example, a corona treatment station, and / or a plasma treatment station, and / or a tape cleaning system (cleaning roller, brush, etc.), and / or a coating station ( flexography, etc.), and / or a sheet turning system; and / or a post-treatment (or finishing) in a coating station (for example by depositing an additional coating, for example gilding or other material) on the substrate, for example by means of a deposit device of " gilding ", for example by applying / pressing a sheet (carrying said coating or gilding) on selected areas of the substrate (for example having an adhesive deposit in a predetermined pattern) so as to adhere to the selected areas the desired portion of the gilding type sheet; in addition, this combination of several modes of printing and / or various treatments within the same machine is made possible thanks to the mode of maintenance / transport of high precision (for example to meet the printing requirements of the printed electronics) according to the present invention while avoiding that the components of the maintenance / transport interferes with the efficiency requirements of each of the printing stations and / or treatments individually and / or in combination (for example for avoid that a drying station affects the performance of a printing station). The present invention also makes it possible to maintain and / or route the substrates of various sizes between all the processing stations while meeting the requirements related to the different speeds of each of the treatment stations as well as to sufficient production rates to allow an efficient and profitable industrial application. INVENTION - device For this purpose, the invention relates to a device for holding substrates in a printing machine comprising one or more processing stations including at least one printing station, the said device comprising a table (preferably a table suction) for holding the substrate in a stationary position with respect to the table (for example immobile and flat) during the treatment (s) of the substrate, characterized in that the holding table comprises a structural layer with nest 'bee.

Indeed, the Applicant has identified during the development and improvements developed for the device of the present invention that the surface temperature of the substrate and therefore the surface temperature of the upper part of the holding table had an influence. Not insignificant not only on the quality of prints (and, in particular, on the quality of printing for printed electronics) but also on the performance of the drying stations. Thus, in an essential embodiment of the present invention, the table (preferably the suction table) comprises a honeycomb structural layer. The Applicant has indeed developed this essential embodiment of the invention because the honeycomb structural layer not only allows to homogenize the surface temperature but also to better dissipate the said temperature in the whole of Table. In addition, this honeycomb structural layer has several additional functions / advantages, among which we will mention by way of illustration and not limitation: • an upper surface which is sufficiently flat to hold the substrate in position, • to allow the passage of air in order to ensure a depression behind the substrate and therefore an optimal maintenance in the suction table option, • to limit the effects of thermal conduction with the substrate due to its small contact surface, • to limit the effects of thermal conduction with the the upper and lower layers of the table (which proved particularly relevant for some treatment stations, eg the infrared drying station), • to help eliminate the vibration problems encountered with maintenance / transport of the prior art, which therefore makes it possible to improve the maintenance / transport of printable substrates and / or printed for / on all processing stations included in a printing machine, in particular a printing machine without contact with the substrate, such as inkjet printing machines. By way of illustration and not limitation, the honeycomb structural layer has a thickness "e" of between 1 and 100 mm, for example between 5 and 30 mm, preferably between 5 and 15 mm, for example 8 mm; the size of the cells (for example cells) is between 10 microns and 10 mm, for example between 1 and 8 mm, preferably between 2 and 5 mm, for example 3.6 mm; the thickness of the walls of the cells (for example cells) is between 0.5 micron and 5 mm, for example between 10 and 200 microns, preferably between 30 and 100 microns, for example 50 pm. By way of illustration and not limitation, the honeycomb structural layer is regularly hexagonal paved as shown in Figure 12; it consists of hexagonal right prisms.

The surface dimensions of the honeycomb structural layer will be selected according to the needs and applications and will preferably correspond to at least the surface of the substrate (or substrates if there are more than one maintained on the same table) ; we will quote for illustrative dimensions (1 / L) in mm of the order of 760/1070. The widths / lengths of this honeycomb structural layer (for example a frame of rectangular parallelepiped shape of height corresponding to the thickness "e" mentioned above) will preferably coincide with those of the passive suction layer described in the description. which follows and preferably also with those of the active suction layer described in the description which follows.

Thus, according to a particular embodiment of the present invention, the table (preferably the suction table) comprises a honeycomb structural layer as defined above. The use of this structural honeycomb layer in the table (preferably the suction table) has made it possible to solve other fundamental problems encountered in the devices of the prior art. Indeed, inkjet printing techniques (whether through a conventional or special ink printing station (for example a conductive) and / or a varnish printing station) require often a rapid drying of the ink (or varnish) which explains why at least one drying station directly follows a printing station along the substrate transport path. This close arrangement is unfortunately not very compatible with the proper functioning of the printheads because close drying may impact on the performance of said heads, for example by a blocking effect of the printing nozzles due to the untimely solidification of the printing heads. ink in these nozzles. Thus, it was necessary with the techniques of the prior art either to move the drying station away from the printing station at the risk of impairing the quality of the print rendering, or to scrupulously control the drying, for example by decreasing the power of drying, at the risk of having to drastically limit the print speeds and also affect the quality of the print rendering. These problems are all the more exacerbated for the field of printed electronics. Thus, the Applicant has discovered that the use of a honeycomb structural layer (as described above) in the table (preferably the suction table) made it possible to overcome these problems of the prior art. represents a considerable advantage for the holding / transport device according to the present invention. In fact, without wishing to be limited by this explanation, the Applicant believes that the use of a honeycomb structural layer (as described above) allows optimal dissipation of the heat generated by the drying station as well as drastic reduction of thermal reflection and transfer phenomena in the table and / or from the table to the print heads; By way of illustration and not limitation, the Applicant believes that the use of a honeycomb structural layer (as described above) makes it possible, for example, to trap the UV radiation of the drying so that it does not interfere (by reflection ) with the proper operation of the printheads and thus do not cause hardening of the ink within the print nozzles. In addition, and this constitutes another advantage according to the present invention, the use of a honeycomb structural layer (as described above) makes it possible to overcome the suction soles of the prior art such as for example those described in the following description (soles usually made mainly of metal and / or polytetrafluoroethylene (also known as Teflon) and drilled with multitudes of holes); indeed, the honeycomb structural layer (as described above) can directly serve as a support sole for the substrates and thus allow the table to exert the suction and thus the maintenance of said substrates on this sole .

In a particular embodiment of the present invention, the honeycomb structural layer is removably attached to the table allowing it to be replaced and / or changed depending on, for example, types of substrates. used. Any removable fastening system may advantageously be used; we will cite for illustrative attachment a type of toggle and / or snap type.

According to an alternative embodiment of the present invention, the honeycomb structural layer is made of aluminum; it is obvious that those skilled in the art will be able to select other materials, similar or not to aluminum, which will also meet the requirements of the present invention, for example steel and / or any plastic and / or or composite and / or suitable ceramic.

According to an alternative embodiment of the present invention, the honeycomb structural layer is not sandwiched, that is to say does not include a lower and / or higher underlayer; this variant is preferred in the case of a suction table so as not to disturb the suction through the cells (for example cells). The invention therefore also relates to a device for transporting substrates in a printing machine comprising one or more processing stations, including at least one printing station, along a transport path from at least one zone (for example an input store providing the printable and / or printed substrates, to at least one output area (eg, store) receiving the processed substrates, comprising; A substrate conveyor (preferably a carousel type) for guiding and moving the substrates through the treatment stations, said conveyor comprising carriages which hold the substrates in a stationary position (for example immobile and flat) and which move along the transport path carrying the substrates, 2. an input zone of the substrates (for example a substrate storage entrance magazine), 3. an optional transport system for the substrates of the zone d 4. An optional transport system for the substrates processed from the carriage to the exit zone of the substrates (for example the outlet magazine). 5. an exit zone of the treated substrates (for example a storage outlet of the treated substrates), 6. an optional siding for the trolleys, said path being releasably connected to the transport path of the conveyor and allowing and to park and / or add and / or remove one or more carriages, and characterized in that 1. the substrate transport device comprises a motorization system that allows the movement of the carriages along the transport path 2. the carriage comprises a table (preferably a suction table) for holding the substrate in a stationary position relative to the table (for example immobile and flat), along the transport path during the treatment (s) ( s) of the substrate, and 3. the holding table comprises a structural layer with a honeycomb. Other features and advantages of the substrate transport device are detailed in the present application. A further object of the invention is to provide a method of transporting printable substrates. For this purpose, the invention also relates to a method of transporting substrates along a transport path, implemented by the substrate transport device according to the invention. In particular, the invention also relates to a method for transporting substrates in a printing machine comprising one or more processing stations, including at least one printing station, along a transport path from at least one zone ( for example, an input store providing the printable substrates, to at least one output area (for example an outlet store) receiving the treated substrates, characterized in that it comprises the following steps: 1. optional positioning of a printable substrate in the input area (e.g. storage of a printable substrate in an input tray), 2. optional transport of the substrate from the input area to the cart. 3. guiding and moving the substrate through the treatment stations by a substrates conveyor (preferably of the carousel type), the said conveyor comprising carriages which hold the substrates in a stationary position (for example immobile and flat) and which move along the transport path carrying the substrates, 4. optional transport of the treated substrate from the carriage to the exit zone (eg to the outlet and storage of the treated substrates), 5. optional displacement from carriages to a siding, said track being releasably connected to the transport path of the conveyor which allows parking and / or adding and / or removing one or more carriages of the conveyor, the transport method of substrates being thus adapted to move each carriage so as to move it along the transport path and characterized in that 1. the substrate transport device comprises a motorization system that allows the carriage to move along the transport path, 2. the carriage comprises a table on which the substrate is held in a stationary position relative to the table (for example immobile and flat) along the path of transport during the treatment (s) of the substrate, and 3. the table comprises a honeycomb structural layer.

According to an embodiment "VARl-DISP" embodiment, the present invention also relates to a substrate transport device in a printing machine comprising one or more processing stations including at least one printing station, along a path transporting from at least one input area (e.g., store) providing the printable and / or printed substrates, to at least one output area (e.g., store) receiving the processed substrates, comprising: 1. a substrate conveyor (preferably of the carousel type) for guiding and moving the substrates through the treatment stations, said conveyor comprising a. a fixed rail that forms a transport loop, and b. carriages which hold the substrates in a stationary position (for example immobile and flat) and which move on said rail carrying the substrates and 2. an input zone of the substrates (for example an entrance magazine of storage of the substrates), 3. an optional transport system of the substrates from the entrance area to the trolley, 4. an optional transport system of the substrates treated from the trolley to the exit zone of the substrates (for example the outlet store), 5. an exit zone of the treated substrates (for example a treated substrates storage outlet store), 6. an optional siding for the trolleys, said track being removably connected to the trolley conveyor and thus making it possible to park and / or add and / or remove one or more carriages, the substrate transport device being thus adapted to move each carriage / substrate assembly so as to move it by means of of the carriage on the rail along the transport loop and characterized in that 1. the substrate transport device comprises a base on which at least a portion of the rail is fixed and whose surface is preferably plane, 2. the substrate transport device comprises a motorization system which allows the carriage to move on the fixed rail; 3. the carriage comprises a table (preferably a suction table) for holding the substrate in a stationary position relative to the table (for still and flat example), along the transport loop during the treatment (s) of the substrate, and 4. the table comprises a structural layer honeycomb.

Thus, in an alternative embodiment of the present invention, the substrate transport device is characterized in that the transport path is a transport loop, in that the conveyor comprises a fixed rail which forms the said transport loop and in that the carriages which hold the substrates in an immobile position move on said rail carrying the substrates, the substrate transport device being thus adapted to move each carriage on the rail along the transport loop and in that 1, the substrate transport device comprises a base on which at least a portion of the rail is fixed and whose surface is preferably flat, and 2. the substrate transport device comprises a motorization system which allows the displacement of the substrates. trolleys on the fixed rail.

According to a variant "VARl-PROC" embodiment, the invention also relates to a method of transporting substrates along a transport path, implemented by the substrate transport device according to the variant embodiment "VARl-DISP According to the invention. In particular, the invention also relates (according to another variant "VAR2-PROC" embodiment) to a method of transporting substrates in a printing machine comprising one or more processing stations including at least one printing station, the along a transport path from at least one input area (e.g., a magazine) providing the printable substrates, to at least one output area (eg, magazine) receiving the processed substrates, characterized in that It comprises the following steps: 1. optional positioning of a printable substrate in the input area (for example storage of a printable substrate in an input store), 2. optional transport of the substrate of the area of input to the carriage, 3. guiding and moving the substrate through the processing stations by a substrate conveyor (preferably carousel type), said conveyor comprising a. a fixed rail that forms a transport loop, and b. carriages which hold the substrates in an immobile position (for example immobile and flat) and which move on said rail carrying the substrates and, ......... ................................. 4. Optional transport of treated trolley substrate to the exit area ( for example to the outlet store and storage of treated substrates), 5. optional displacement of carriages to a siding, said track being removably connected to the conveyor rail which allows parking and / or adding and / or removing one or more carriages from the conveyor, the method of transporting substrates thus being adapted to move each carriage so as to move it on the rail along the transport loop and characterized in that substrate transport device comprises a base on which at least a portion of the rail is fixed and the surface of which is preferably flat, 2. the transport device rt of substrates comprises a motorization system that allows the carriage to move on the fixed rail, 3. the carriage comprises a table on which the substrate is held in a stationary position relative to the table (for example immobile and flat) along of the transport loop during the treatment (s) of the substrate, and 4. the table comprises a honeycomb structural layer.

In a preferred embodiment of the present invention, the substrate is held flat in a stationary position relative to the table; however, as the present invention can also be applied to sheet-like substrates but also to any other type of three-dimensional object (for example cylinders, pens, telephone shells, etc.), Those skilled in the art will understand that the invention may advantageously also be suitable for these other objects without qualifying their immobile positioning being "flat" on the table; according to an alternative embodiment of the present invention, the upper part of the table will comprise a matrix comprising shapes and / or receptacles in which these other types of three-dimensional objects may advantageously be deposited and / or fixed.

The present invention also relates to the use of the device and / or the method of maintaining / transporting claimed substrates in a printing machine comprising at least one non-contact printing station, in particular digital inkjet printing. . More particularly, this use is performed in a printing machine which comprises at least two different contactless printing stations in series, said printing being selected from the following list: conventional ink prints (black, white, mono and / or polychrome), and / or varnish, and / or inks adapted to the printed electronics, and / or inks suitable for printing in three dimensions and / or various inks and various such as for example functional inks and / or insulating inks (eg insulating inks used downstream of an ink print for the printed electronics); the combination in series (for example on the transport loop) of conventional ink printing, printing of inks suitable for printed electronics (such as conductive inks based on nanoparticles or not) and of a printing of varnish and / or functional inks and / or insulating inks, the whole being preferably carried out on the same substrate, is a preferred use of the present invention. The invention, with its features and advantages, will emerge more clearly on reading the description given with reference to the appended drawings in which:

Figures 1 to 13 schematically illustrate several aspects and embodiments of the invention.

The present invention has many advantages over the techniques of the prior art. These advantages provided by the present invention will be highlighted further in the detailed description of the figures.

In a preferred embodiment of the present invention, the holding / transport device (and therefore the printing machine comprising one or more processing stations) is controlled by computer means that control in particular the various workstations, and also collect information from the various sensors installed in the device. These computer means do not have to be detailed in the present application and they may for example be integrated in the machine or deported in a separate device. The sensors give, for example, position information of the substrates, configuration information of the substrates and / or validation information following a correctly performed operation or not. Some information necessary for the implementation of the invention may also be recorded in advance in the computer means (for example via input on an interface by an operator). Such information may for example relate to the shape and / or the dimensions of the substrates (for example their thickness), the power of the drying, the thickness of the layer of the ink and / or varnish etc., but it is generally preferred that sensors measure or verify such information. The substrates awaiting printing are generally, in a manner known per se, placed in at least one input zone, for example an input magazine having a storage capacity defined according to the nature of the substrate and the needs for the impression. In an exemplary embodiment, an input store is provided to accept several tens, hundreds or even thousands of substrates of a different nature, thickness and dimension (for example and without limitation a format whose sides are of the order of a centimeter, for example an AlO type format, as a more specific example a credit card type format, up to the format whose sides are of the order of several meters, for example a type AO format or a format of 2 x 2 meters). Once the printing process is complete, the substrates are directed to an output area, for example stored in at least one output store having generally the same storage capacity as the input store.

A feature of a particular embodiment of the present invention is therefore the use of a substrate conveyor (preferably a carousel type) for guiding and moving the substrates through the treatment stations, the said conveyor comprising trolleys which keep the substrates in a stationary position (for example immobile and flat) and which move along the transport path, preferably on a fixed rail, which makes it possible to move each trolley / substrate assembly on the rail, and being characterized in that the movement of the carriages is controlled by means of a motorization system, preferably a linear motorization system. This linear motorization is based on the principle of an electromagnetic interaction between a coil assembly (primary assembly) and a permanent magnet channel (secondary assembly), an interaction that transforms electrical energy into linear mechanical energy. In a preferred embodiment of the present invention, the primary motor assembly of the linear motorization is part of the carriage (mobile) and the secondary assembly consists of a magnet channel (also called magnetic path), the said track being fixed along the transport path; in alternative embodiments, some of which will be described in more detail below in the description, said channel is fixed on the fixed rail (or is an integral part of the fixed rail) and / or is fixed on the base (or is an integral part of the base) and / or is fixed on a rigid structure for holding the rail (or is an integral part of this rigid structure); in these configurations, the primary assembly of a carriage therefore moves at the same speed as the substrate transported by said carriage.

The length of the magnet path is preferably similar to the length of the transport path and / or the transport loop (e.g. the length of the fixed rail). It will be possible to envisage configurations in which the magnet path is located on one side or the other side (or on both sides in a multi-path configuration) of the fixed rail. Thus, the total length of a magnet channel may have a length that is identical, slightly greater, or slightly less than that of the transport path and / or the transport loop (for example that of the fixed rail); for purely illustrative and non-limiting purposes, the magnet path will have a length between 0.8 times and 1.2 times the length of the transport path and / or the transport loop (for example the length of the fixed rail) preferably between 0.9 times and 1.1 times the length of the transport path and / or the transport loop (for example the length of the fixed rail).

The advantages of this motorization technology are numerous. By way of nonlimiting illustration, we will mention the direct coupling of the mobile carriage to the moving part of the motor which eliminates the need for transmission elements such as drive belts, rack gears or worm gears, ball screws, etc. there is little or no mechanical wear as there is no contact with the moving parts, which gives excellent reliability and a long service life, the possibility to control individually the speed and / or the acceleration and / or deceleration of each truck, reducing the number of mechanical components that minimizes maintenance and thus reduce the cost of using this technology.

Figure 1 schematically illustrates an overview of the substrate transport device according to the present invention. There can be seen the carousel-type substrate conveyor for guiding and moving the substrates, said conveyor comprising a fixed rail which forms a closed transport loop (a rectangle with rounded corners in the figure); carts (three carriages in the figure) which hold the substrates (three rectangular substrates per carriage) in an immobile position (flat in the figure) and which move on said rail carrying the substrates; the central fixed rail and the magnet channel positioned at its center; the fixed base (the length of which is slightly less than a length of the side of the rectangle forming the transport loop in this illustration); and a simplified view of the electrically conductive rails which, in this configuration form a closed loop (of the same shape as the transport loop) of greater length than that of the fixed rail because located outside the loop formed by the rail. To facilitate the understanding of this figure, the processing stations were not represented; for illustrative purposes, the positioning of the printing stations along this transport loop will coincide with the position of the base in order to fully benefit from the advantages of the present invention.

Figure 2 schematically illustrates a view of the secondary assembly which consists of a magnet path (also called magnetic path), said path being in this illustration fixed on the fixed rail. It is also possible to identify in this FIG. 2 the base, the electromagnets, the double V-guide at the ends of the fixed rail, as well as the two rails located on either side of the fixed rail, the said slides being detailed below. after in the description.

Figure 3 schematically illustrates an overview of the substrate transport device in a printing machine comprising a plurality of processing stations according to the present invention. The conveyor of carousel-type substrates for guiding and moving the substrates through the processing stations can be provided therein, the conveyor comprising a fixed rail which forms a closed transport loop, and eighties (not shown) which maintain the substrates in an immobile position (for example flat) and which move on said rail carrying the substrates, a substrate storage inlet magazine on the left of the figure, a substrate transport system of the input store to the trolley, a system for transporting treated substrates from the trolley to the outlet magazine, and a storage outlet magazine for the treated substrates to the right of the figure. The "Alphajet" block located at the top left of the figure and positioned in this configuration inside the loop corresponds to the printing and drying stations; in particular in this configuration, a series combination of a conventional ink printing, an ink printing adapted to the printed electronics (such as conductive inks based on nanoparticles or not) and a varnish printing and / or functional inks and / or insulating inks.

A characteristic of a preferred variant of the present invention is therefore the use of a substrates conveyor (preferably of the carousel type) for guiding and moving the substrates through the treatment stations, the said conveyor comprising trolleys which maintain the substrates in a stationary (eg flat) position and which move along the transport path (for example on a fixed rail) which forms a transport loop, for example a closed transport loop. The shape of the transport loop may be of any suitable type. Its length will itself be determined according to the number of processing stations included in the printing machine. In particular, the printing machine according to the present invention comprises at least one non-contact printing station with the substrate (for example two, three, four or more printing stations) and at least one drying station (by example two, three, four or more drying stations); the printing station can advantageously be selected from a conventional inkjet printing station (black, white, mono and / or polychrome) and / or a varnish jet printing station, and / or a station ink-jet printing apparatus adapted to the printed electronics (e.g. conductive ink whether or not based on nanoparticles), and / or an ink-jet printing station suitable for three-dimensional printing dimensions and / or a different ink jet print station such as functional inks and / or insulating inks (eg insulating inks used downstream of an ink print for printed electronics ); the drying station can advantageously be selected from an infrared drying station (IR) and / or a near-infrared drying station (NIR) and / or a heated air drying station, and / or a ultraviolet (UV) lamp drying station and / or a UV light-emitting diode (LED) drying station and / or a photonic drying station. The optional use of one or more pretreatment stations, for example a corona treatment station, and / or a plasma treatment station, and / or a strip cleaning system (cleaning roller, may be mentioned by way of nonlimiting illustration). , brush, etc.), and / or a coating station (flexography, etc.), and / or a sheet turning system; and / or the optional use of one or more post-processing (or finishing) stations such as, for example, a sheet turning system and / or a coating station (for example by deposition of an additional coating, for example gilding or other material) on the substrate, for example by means of a "gilding" deposition device, for example by applying / pressing a sheet (carrying said coating or gilding) on selected areas of the substrate (for example comprising a deposit of adhesive in a predetermined pattern) so as to adhere to the selected areas the desired portion of the home-type sheet. This combination of several printing modes and / or various treatments within the same machine is made possible by the high-precision transport mode according to the present invention while avoiding that the transport components interfere with the requirements. efficiencies of each of the printing stations and / or treatments individually and / or in combination. The present invention thus makes it possible to route the substrates of various sizes / sizes between all the treatment stations while meeting the requirements related to the speeds (whether different or identical) required during the passage of the substrates in each of the treatment stations. as well as manufacturing rates sufficient to allow an efficient and profitable industrial application. The motorization technology, in particular the linear motor technology, used for the transport of the substrates makes it possible to control individually the speed of each carriage; this allows on request to accelerate or decelerate the speed of a carriage, or to change the relative speed of a carriage relative to another carriage. Thus, in a particular embodiment of the present invention, at time "t" the speed of at least one carriage (transporting substrates) moving along the transport loop is different from the speed of a another carriage (transporting substrates) moving along the transport loop; for example, the speed of at least one transport carriage moving substrates through a processing station is different from the speed of a transport carriage moving substrates or through another processing station of the transport loop, or through other sections of the transport loop. This ability to individually control the speed and / or acceleration and / or deceleration of each carriage as it moves along the transport path is an exceptional advantage according to the present invention. This makes it possible to fully benefit from the performance of each of the treatment stations by adapting the speed of the carriage to the type of treatment desired. In a particular embodiment, the present invention therefore also allows printing and / or drying and / or various variable pitch treatments.

In a particular embodiment of the present invention, the transport loop does not include a right angle; on the contrary, its shape will be preferentially selected so as to comprise only straight linear parts joined by means of curves ("arcs") of free form. Other alternative embodiments are of course conceivable for the transport loop. By way of illustration, mention may be made of the variant of FIG. 4 in which the carriages do not perform curves (bends) as they move along the carousel; it can be seen the carousel-type loop, six carriages each supporting a substrate "A", each substrate being stationary on its own carriage and the direction of movement, represented by arrows, each of the carriages.

By way of illustration, mention may also be made of the variant of FIG. 5 in which the carriages do not perform curves (bends) during their displacement and the loop comprises at least one rail (for example 2 parallel rails) located at a certain height and at least one rail (for example 2 parallel rails) perpendicular (s) to the first rail and located at another height which involve the use of a system for raising and / or lowering the carriage (as an elevator ) to go from one rail to another. Even if these variants are not preferred in the context of the present invention, they could nevertheless be useful, for example in the case where one would be limited in terms of available space to install the transport device and therefore the congestion would require more compact transport solutions.

In a particular embodiment of the present invention, the transport loop is square or rectangle with rounded corners.

In a particular embodiment of the present invention, the processing stations, for example the printing and / or drying stations are located in a straight linear part of the transport loop.

The usual direction of rotation of the carriages along the transport loop is generally defined according to the arrangement of the printing and / or drying stations and / or other processing stations (f) of the substrates. It can therefore be clockwise or counterclockwise. Another advantage of the linear motor technology according to the present invention is that the direction of rotation can be reversed if necessary. Thus, in a particular embodiment of the present invention, the carriage and the substrate (s) maintained (s) in a stationary position (for example flat) on the carriage can move in both directions on along the transport path, for example in both directions of rotation on the transport loop. This characteristic makes it possible, for example, to make more than one passage in a printing station and / or a drying station and / or another station for treating the substrates, and / or in a combination of two or more or all of them. these positions. This flexibility can be particularly advantageous, for example in the case of temporary lower performance or depending on the type of treatment station concerned; By way of illustration and not limitation, a processing station may require a repeated passage of the substrate so as to reach the desired printing resolution (for a printing station) and / or the desired drying quality (for example for a station). drying of which one would not wish to increase the drying power) and / or having to perform multi-pass while other treatment stations will not need it. Controlling the movements of the carriages autonomously therefore constitutes a considerable advantage of the present invention.

In principle, the substrates perform on their selected trolley only a passage along the transport path, for example the turn of the transport loop, since they are held in a stationary position (for example flat) on the trolley near the input and storage store of the substrates to their point of removal from the same carriage near the outlet store and storage of treated substrates.

However, and this represents an additional advantage of the present invention, two or even several passages along the transport path, and / or several turns of the transport loop, are possible for the substrate. Thus, in a particular embodiment of the present invention, the substrate may perform more than one pass in a printing station and / or a drying station and / or another substrate processing station, and / or in a combination two or more or all of the above, without leaving his cart. This feature may be particularly useful when a printing station and / or a drying station and / or other substrate processing station does not achieve the required performance, for example in terms of image resolution. printed for a printing station; thus, a second passage under the lower performance station will solve the identified problem without having to change the emergency in the emergency.

A preferred feature of an alternative embodiment of the present invention is therefore the use of a substrate conveyor (preferably a carousel type) for guiding and moving the substrates through the treatment stations, the said conveyor comprising a or several carriages which hold the substrates in a stationary position (for example flat) and which move on a fixed rail along the transport path (for example along the transport loop) during the treatments of the substrate, and characterized in that at least a portion of the rail is fixed on a base whose surface is preferably flat; the length of the fixed rail preferably being identical to that of the transport path (for example of the transport loop).

Figure 6 schematically illustrates this base-rail assembly. It can be seen for illustrative purposes a base in granite which is the base in dark gray on which a fixed rail double guide V is fixed; there is an optional retaining piece which is fixed on the fixed rail, a part to which are attached - on its left a rule which will be described in the description below - and on its top, the magnet channel already described here. -before. This FIG. 6 also very schematically illustrates elements which will be described in more detail in the description below, namely, on either side of the fixed rail of the rails fixed on the base and at the left end of the a set of electrically conductive rails surmounted by a radiating data transfer cable (information).

The dimensions of the base will be selected according to needs and applications. By way of illustration and not limitation, for industrial applications particularly targeted by the type of device claimed, the upper flat surface of the base will be disposed at a height of the ground between 50 cm and 80 cm and will have a transverse width of between 40 cm and 120 cm, for example between 60 cm and 100 cm, and a length of between 200 cm and 1200 cm, for example 500 cm and 800 cm.

In a particular embodiment of the present invention, the total length of the base (s) of the transport device is selected so as to cover the entire space below the printing stations of the transport loop. transport. More particularly, if the value of the total length of the printing stations is X, the total length of the base (s) of the transport device will be at least X, so as to guarantee the desired flatness under the posts. printing; however, as this (s) base (s) represent a weight and a significant financial investment, it is preferable to limit their total length to values less than 3 times X, preferably less than 2 times X, for example less than 1.5 times X, see less than 1.2 times X.

In a particular embodiment of the present invention, the total length of the base (s) of the transport device is also selected to cover the entire space below the drying stations of the transport loop. transport. More particularly, if the value of the total length of the drying stations is Y and the value of the total length of the printing stations is X, the total length of the base (s) of the transport device will be minus (X + Y), in order to guarantee the desired flatness under the drying and printing stations; however, since this base (s) represent a weight and a significant financial investment, it is preferable to limit their total length to values less than 3 times (X + Y), preferably less than 2 times (X + Y) for example less than 1.5 times (X + Y), see less than 1.2 times (X + Y).

In a particular embodiment of the present invention, the total length of the base (s) of the transport device is also selected so as to cover the entire space below the other processing stations (the stations). which are neither printing nor drying) of the transport loop as, for illustrative purposes, the pre- and / or post-processing stations. More particularly, if the value of the total length of the other processing stations is Z, the value of the total length of the drying stations is Y and the value of the total length of the printing stations is X, the total length the base (s) of the transport device will be at least (X + Y + Z), so as to ensure the required flatness under all drying stations, printing and other treatments; however, as this base (s) represent a weight and a significant financial investment, it is preferable to limit their total length to values less than 3 times (X + Y + Z), preferably less than 2 times (X + Y + Z), for example less than 1.5 times (X + Y + Z), see less than 1.2 times (X + Y + Z).

In an alternative embodiment according to the present invention, the total length of the base (s) of the transport device is less than half the length of the transport path (for example of the transport loop), less than 0 , 4 times the length of the transport path (for example of the transport loop), for example less than one third of the length of the transport path (for example of the transport loop).

In a particular embodiment of the present invention and, more particularly, as a function of the length of the transport path (for example of the transport loop) and / or the arrangement of the printing and / or drying stations and / or other treatments, one, two or more pedestals will be arranged in the transport device.

The base, its flatness and its dimensions therefore represent important characteristics according to certain variants of the present invention. Thus, the base forms the stable base / solid base of the carriage (and / or the rail) along the transport path (for example along the transport loop) at the most critical places, such as under the printing stations. . More particularly, the Applicant has found that the base makes it possible to effectively solve the vibration problems encountered with the transport devices of the prior art, which therefore makes it possible to improve the transport of printable and / or printed substrates on the whole. processing stations included in a printing machine, particularly a non-contact printing machine with the substrate, such as inkjet printing machines. This explains the choice of a polishable firm rock, generically referred to as marble, for example granite, and / or basalt, and / or porphyry, and / or serpentinite, and / or gneisses, and and / or sandstones, and / or gaps, and / or limestones and / or other conglomerates, as constitutive element (s) of a base used in a preferred embodiment according to the present invention. It is obvious that those skilled in the art will be able to select other materials, similar or not to marble, which will also meet the requirements of absence of vibrations to ensure the quality of prints; for example, granite (generic term used in the construction and designating any natural material having the appearance of a rock which is generally very hard and very resistant to wear), and / or composite stones and / or ceramics and / or technical ceramics and / or melting. The Applicant has found that the weight ratios between the base, the carriage and the substrate (s) were also important characteristics to combat the vibrations of the transport device; thus, in an alternative embodiment of the present invention, the ratio between the weight of a carriage of length L and the weight of a length L of the base will be less than 0.3, for example less than 0.2; in an alternative embodiment of the present invention, the ratio between the weight [of a carriage of length L and substrates arranged on said carriage] and the weight of a length L of the base will be less than 0.3, for example less than 0.2.

Any guiding system trolleys along the transport path (for example on the rail) may advantageously be used in the context of the present invention. In a particular embodiment of the present invention, the guide system of the carriages on the rail is selected from the V guide systems; preferably having a double V-guide as shown in Figures 6 (rail with the ends in V "male") and Figure 7 (V-shaped "female" wheels attached to the carriage). In a particular embodiment of the present invention, the carriage comprises at least one V-wheel, preferably 2 V-wheels, more particularly at least 4 V-wheels.

According to a preferred embodiment of the present invention, the guide system of the carriage on the rail comprises at least a pair of guide elements disposed on either side of the rail (for example wheels); each pair of guide elements (for example a pair of wheels) comprising a mechanism for guiding the carriage both in the straight lines and in the turns. By way of illustration and not limitation, each pair of guide elements will comprise a holding bar which connects the two guide elements to each other (for example the two wheels together), the said holding bar comprising a pivoting axis connected to the carriage to ensure optimal guidance of the carriage along the rail and, in particular along the turns formed by the transport loop.

In a particular embodiment of the invention, the guiding system of the carriage on the rail comprises 3 guiding elements (for example 3 wheels), 2 on one side of the rail and 1 on the other side of the rail so as to allow to the carriage to take the turns formed by the transport loop and also to follow linear directions.

FIG. 7 thus illustrates a variant of carriage according to the present invention, said carriage comprising a structural base represented in light gray in the figure surmounted by a table (in dark gray) for supporting the substrates which will be detailed below in the description ; it can also be seen under the base 2 V-shaped wheels surrounded by two runners slides which will be detailed below in the description and to the left of the base, a sliding contact element (serving to supply energy to the carriage). A variant of FIG. 7 (not shown) will be to arrange the V-shaped wheels so that they surround the runners of the runners, which will preferably imply that the rails of the runners will be positioned on the fixed rail and that the height of the runners Slider pads will be lower than V-shaped wheels under the base of the carriage.

In a particular embodiment of the present invention, the carriages guiding system therefore comprises at least one rail coupled to the wheel (s) of the carriage according to a V-guide device; this allows to guide the wheel (s) in the carriage in the (s) V of the rail; preferably a rail with double V-guide which allows to guide the V-shaped wheels of the carriage. Thus, in a particular embodiment of the present invention, the carriage is provided with 4 V-shaped wheels (preferably symmetrically two by two with respect to the center of the carriage), two of the wheels being guided by the V d one side of the rail and the other two wheels being guided by the V on the other side of the rail.

In a particular embodiment of the present invention, the rail is positioned centrally with respect to the width of the carriage and / or the width of the pedestal; thus, in an alternative embodiment of the present invention the center of the width of the rail is at a distance of less than 20 cm, for example less than 15 cm from the center of the width of the carriage and / or the center of the width of the base. In a particular embodiment of the present invention, the center of the width of the magnet channel is aligned with the center of the width of the fixed rail.

Thus, according to a feature of the present invention, at least a portion of the rail is fixed on a base or is an integral part of said base. One could advantageously use a base along the entire length of the rail for fixing. However, as these bases and, in particular the bases defined above, represent a weight and a significant financial investment, it is also possible to provide any suitable type of rigid structure hollowed out for the fixing of the rail - or for the integration of the rail into said structure - along the transport path; we will mention for illustrative purposes a mechanically welded frame and / or a profiled frame. In a particular embodiment according to the present invention, a hollow rigid structure is used for fixing the rail (or for the integration of the rail in said structure) outside the printing stations and / or drying stations and / or any other substrate processing station. Thus, in an alternative embodiment according to the present invention, the total length of the recessed rigid structure used for fixing the rail of the transport device is greater than or equal to half the length of the transport path (for example of the loop transport), greater than or equal to 0.6 times the length of said path (of the transport loop), for example greater than or equal to two-thirds of said path (the length of the transport loop).

In a preferred embodiment of the present invention, the transport device is equipped with at least one displacement detection system (or sensor), preferably a linear displacement detection system (or sensor), for measuring the displacement (position, speed, acceleration and / or deceleration) of the carriage along the transport path, for example with respect to the fixed rail. Any displacement detection system (or sensor) satisfying the required accuracy requirements may advantageously be used in the device according to the present invention. By way of nonlimiting illustration, there will be mentioned a displacement sensor comprising a mobile part and a fixed part, for example an optical ruler. In a preferred embodiment of the present invention, the fixed portion of the displacement sensor (e.g., the optical ruler) preferably consists of a linear ruler preferably positioned along the transport path (of the transport loop) under printing stations and / or drying stations and / or any other substrate processing station requiring increased accuracy in measuring position, speed, acceleration and / or deceleration of the carriage along the transport path (of the transport loop), preferably under the printing stations. This rule (preferably linear) can therefore advantageously be an integral part of the rail and / or be fixed on the rail and / or be fixed on the base of the rail and / or be an integral part of the base of the rail and / or be fixed to the rail. rail structure and / or an integral part of the rail structure. The presence of the (preferably linear) rule thus makes it possible to determine at any time the positioning, the speed, the acceleration and / or the deceleration of the carriages along the transport path (on the transport loop). In a preferred embodiment of the present invention, the carriage integrates at least one reader (preferably an optical reader) which constitutes the moving part of the displacement sensor.

Figure 1 schematically illustrates an overview of the substrate transport device according to the present invention. It can be seen the carousel substrates conveyor for guiding and moving the substrates, said conveyor comprising a fixed rail which forms a closed transport loop, and trolleys that hold the substrates in a stationary position (for example flat ) and which move on said rail carrying the substrates, displacement control being allowed thanks to the linear rule which in this Figure 1 is merged with the fixed rail. Figure 6 also schematically illustrates the rule which is positioned in this configuration to the left of the optional holding member which is fixed on the fixed rail.

In a preferred embodiment of the present invention, the transport device is equipped with at least one displacement sensor, preferably a linear displacement sensor, for measuring displacement (position, speed, acceleration and / or deceleration). of the carriage with respect to the processing station (s). Any displacement sensor satisfying the required accuracy requirements may advantageously be used in the device according to the present invention. By way of illustration and without limitation, there will be mentioned a displacement sensor comprising a moving part and a fixed part, for example a magnetic ruler. In a preferred embodiment of the present invention, the moving part of the sensor ("moving" as it moves with the carriage) of displacement (for example the magnetic sensor) preferably consists of a linear rule fixed along a longitudinal axis. (that is parallel to the direction of travel of the truck) on the truck (or as an integral part of the truck). The presence of the rule, preferably linear, thus makes it possible to determine at any time the positioning, speed, acceleration and / or deceleration of the carriages along the transport path (for example on the transport loop) relative to the processing position (s). In a preferred embodiment of the present invention, at least one processing station, preferably at least one printing station, preferably all the printing stations, or even all the processing stations, integrate at least one reader (preferably a magnetic reader) which constitutes the fixed part of the displacement sensor.

In a preferred embodiment of the present invention, the transport device is equipped with at least one displacement sensor "O" for measuring the displacement of the carriage with respect to the transport path (for example the rail) and of at least one displacement sensor "M" for measuring the movement of the carriage relative to the treatment station. In a particular embodiment of the present invention, the sensor reader "O" and the sensor rule "M" are on the carriage. In a particular embodiment of the present invention, the rule of the "O" sensor is an integral part of the rail and / or is fixed on the rail and / or is fixed on the base of the rail and / or is an integral part of the base rail and / or is fixed to the rail structure and / or is an integral part of the rail structure. In a particular embodiment of the present invention, the sensor reader "M" is fixed on a fixed (or mobile) element of a printing station and / or a drying station and / or another treatment station. In a particular embodiment of the present invention, the "O" sensor is an optical linear displacement sensor and the "M" sensor is a magnetic linear displacement sensor. Indeed, the Applicant has discovered, by virtue of the combination of these two displacement sensors, that an exceptional measurement accuracy level (for example of the order of one micrometer on the critical sections of the transport loop, could be achieved). for example of the order of one micrometer on transport loop lengths of the order of a meter) thus allowing optimized management of the management of the positioning and / or the speed and / or the acceleration and / or the deceleration of the carriages along the transport path, for example along the transport loop.

In a preferred embodiment of the present invention, the transport device also comprises at least one slideway, for example a slideway disposed on each side of the fixed rail which is preferably central.

Figures 2,6 illustrate schematically the components of these guide rails which, in this illustration and this embodiment, consist of rails and guide elements (eg guide pads) attached to the carriage; in Figures 2 and 6, the rails of the two rails are fixed on the base and located on either side of the fixed rail; in Figure 7, the slides of the slides are arranged under the base of the carriage and they surround the V-shaped wheels of the guide system. As a reminder, a variant of Figure 7 (not shown) will be to arrange the V-shaped wheels so that they surround the runners of the slides, which will preferably imply that the tracks of the rails will be positioned on the fixed rail and that the height of the slides of the slides will be lower than that of the V-shaped wheels under the base of the carriage; in this configuration, the use of a single rail for the slide is possible even if this is not a preferred variant according to the present invention.

Any type of slide can advantageously be used according to the present invention.

In a preferred embodiment of the present invention, the slide comprises a rail, preferably two rails located on each side of the rail (preferably central), which are either fixed on the base or form an integral part of said base.

In an alternative embodiment according to the present invention, the slideway comprises a rail, preferably two rails that are part of the fixed rail (preferably central) and / or are fixed on the fixed rail (preferably central) and / or are fixed on the base of the fixed rail (preferably central) and / or form an integral part of the base of the fixed rail (preferably central) and / or are fixed on the fixed rail structure (preferably central) and / or be part of integral of the fixed rail structure (preferably central).

In a preferred embodiment of the present invention, the slide is smooth and preferably comprises on the carriage one or more elements (for example "female") guiding elements, preferably at least two, for example at least 4 (as illustrated in Figure 7), for example slippery pads.

In a preferred embodiment of the present invention, the slide is a dovetail slide.

In fact, without wishing to be limited by this explanation, the Applicant believes that the use of the central rail and its guidance in combination with the above-mentioned slideway not only makes it possible to meet the requirements of precise displacement of the carriage along the transport path (for example). example of the transport loop) but also to allow an optimized displacement during the curves of the transport path (of the transport loop).

According to an alternative embodiment of the present invention, the length of the rail (s) of (s) slide (s) may be identical to the length of the fixed rail or the transport path (of the transport loop). However, and this is a preferred embodiment according to the present invention, the total length of this (s) rail (s) slide (s) will preferably be lower than that of the fixed rail because it is preferable not to put in the curves / turns formed by the transport path (the transport loop); we speak of total length of rail per slide, because said rail of a slide may in fact consist of several pieces of rails along the path (of the loop) transport.

In a preferred embodiment of the present invention, the total length of the rail of a slide of the transport device is selected so as to cover the entire space below the printing stations of the path (of the loop ) transport. More particularly, if the value of the total length of the printing stations is X, the total length of the rail of a slide of the transport device will be at least X, so as to guarantee the flatness sought under the stations of printing and the requirements for precise carriage displacement along the transport loop. However, since the presence of this slide rail is not essential outside the printing stations, the total length of the rail of a slide of the transport device will for example be limited to values less than 3 times X, of preferably less than 2 times X, for example less than 1.5 times X, see less than 1.2 times X.

In an alternative embodiment according to the present invention, the total length of the rail of a slide of the transport device is less than the sum of the lengths of the linear parts of the transport path (for example of the transport loop), for example lower at half the length of the transport path and / or the transport loop, less than 0.4 times the length of the transport path and / or the transport loop, for example less than one third of the length of the path transport and / or transport loop.

In an alternative embodiment according to the present invention (or in the particular case when the total length of the rail of a slide of the transport device is less than the length of the transport loop (and / or when said rail is composed of several parts of rails along the transport loop)), the width of the initial end (the entry in the direction of the carriage movement) and / or the width of the final end (the exit in the direction of the displacement of the carriage) of said rail will advantageously be less than the average width of said rail; without wishing to be limited by this explanation, the Applicant thinks that this makes it possible to ensure optimal insertion (and / or output) of the guide element (for example from / to the pads) into the rail while limiting the mechanical wear. , premature degradation of the rails and vibration phenomena that may interfere with the objectives of the present invention. As an illustration, a V-shaped input and / or an inverted V-shaped output for the rail of a slide of the transport device may be mentioned.

According to a preferred embodiment of the present invention, the guide system of the carriage on the fixed rail comprises at least a pair of guide elements disposed on either side of the rail (for example wheels), each pair of guiding elements (for example a pair of wheels) comprising a mechanism for guiding the carriage both in the straight lines and in the turns, for example a holding bar which connects the two guiding elements together (for example the two wheels between them), said support bar comprising a pivoting axis connected to the carriage for ensuring optimal guidance of the carriage along the rail and, in particular along the bends formed by the transport path (for example the loop transport), and at least one slide consisting of fixed rail (s) and guide elements as described above, said elements forming with the (s) rail (s) a slide connection (for example the skates).

A feature of an embodiment of the present invention is therefore the use of a substrate conveyor preferably of the carousel type for guiding and moving the substrates through the processing stations, the said conveyor comprising at least one , preferably several carriages which hold the substrates in an immobile position (for example flat) and which move along the transport path (for example on a fixed rail which makes it possible to move each trolley / substrate assembly on the rail) and being characterized in that said carriage comprises a table, preferably a suction table, for holding the substrate in a stationary (eg flat) position with respect to the table along the transport loop during the substrate treatments . Fig. 7 illustrates illustratively the carriage and some of its components, for example, a substrate holding table, the V-shaped wheels of the guide system as well as the runners of the slideways, a sliding (electrical) contact element. The dimensions of the trolleys and tables will be selected according to the needs and applications while taking into account the factors of size, weight and machining. By way of illustration and not limitation, we have designed trolleys of dimensions (1 / L / H) in mm of 800/1250/3000 including tables (of maintenance) dimensions (l / L / H) in mm of 765 / 1075/1500.

In an alternative embodiment of the present invention, the carriage is equipped with an identification means allowing the "personalization" during the passage of the carriage thus identified through any station of the device according to the present invention. The present invention may use any identification technology, preferably contactless trolleys. By way of nonlimiting illustration, this identification means may advantageously be selected from RFID (Radio Frequency Identification) technologies for remotely storing and retrieving data using markers known as "tag-tags". "(Or" tag "or" transponder "), the barcode, and / or any other technology based on a recognition principle, for example an optical transceiver.To illustrate and not to limit, we can identify the trolley maintenance (for example the "ink jet head cleaning" trolley inserted in the flow of the mobile carriages) and thus avoid any treatment with regard to the substrates and this, also including the absence of loading and / or unloading of substrate on this maintenance cart.

An essential characteristic of the present invention is therefore that the device for holding / transporting substrates (in a printing machine comprising one or more processing stations including at least one printing station) comprises a substrate holding table in a stationary position with respect to the table during the treatment (s) of the substrate, and characterized in that the holding table comprises a structural layer with honeycomb. According to an alternative embodiment of the present invention, any type of preferably flat upper surface table and any system for holding the substrate in a stationary position (for example flat) on said table may advantageously be used provided that the said table includes a structural layer with honeycomb. Thus, according to a particular embodiment of the present invention, the holding force exerted by the holding system in the immobile position of said substrate on the table will be greater than any other force that could cause the displacement of the substrate during the treatments of the said substrate and / or when the carriage moves. As an illustration of the substrate holding system in a stationary position (for example flat) on the table, we will mention means for gripping or pressing the substrate, for example clamps and / or clamping strips. In order to meet the particular objectives of the present invention, therefore, the dimensions of the table will preferably meet the following criteria: a transverse dimension (i.e., perpendicular to the longitudinal axis in the plane of the transport path) to less than the transverse magnitude of the largest substrate used - and a longitudinal dimension at least equivalent to the longitudinal dimension of the largest substrate used; an additional advantage of the present invention is that several substrates (identical or different) can be maintained in a stationary position (for example flat) on the table which demonstrates the exceptional flexibility provided by the device according to the present invention. The upper layer of the carriage shown in Figure 7 is a simplified schematic representation of the entire holding table (front view). A representation of three identical substrates held in a stationary position on a holding table is described for illustrative purposes in FIG. 8 (view from above).

A feature of a particular and preferred embodiment of the present invention is therefore the use as a holding table of a suction table (which is preferably part of the transport carriage) and which makes it possible to maintain the substrates in a stationary position (for example flat), for example along the transport path (preferably along the transport loop). Suction tables and their operation are well known to those skilled in the art and the latter can therefore easily use a suction table suitable for the present invention. The constitution and the dimensions of the suction table are not critical as long as it fulfills its role of holding in a stationary position (for example flat) of the substrate. Thus, according to a particular embodiment of the present invention, the holding force in the immobile position of said substrate on the suction table will be greater than any other force that could cause the displacement of the substrate during the treatments of said substrate and / or when moving the carriage; the case of the influence that a drying with a heated air current could have on the position of the substrate on the suction table, which influence must therefore be annihilated thanks to the holding force of the table, will be mentioned by way of illustration and without being limiting. extractor.

The upper part of the suction tables is generally called the suction sole, which is usually made mainly of metal and / or polytetrafluoroethylene (also known as Teflon) pierced with multitudes of holes allowing the table to exercise suction and therefore the maintenance through this suction force of the substrate on the sole. In a preferred embodiment of the present invention, a hearth of the type described above is not used as illustrated below in the description of the figures.

The lower part of the suction tables generally consists of an active suction zone (active suction assembly). The suction tables and their operation are well known to those skilled in the art and the latter can therefore easily use a suction table comprising an active suction zone suitable for the present invention, namely an active suction zone powerful enough to be able to maintain the substrate in a stationary position (for example flat) on the suction table. By way of illustration, an active active suction zone is shown in FIG. 9 where it can be seen that the active suction zone comprises five aspirations (represented in the figure by fans) which are preferably individually adjustable. As a reminder, it has already been stated that a major objective of the present invention is to prevent the components of the transport device from interfering with the efficiency requirements of each of the printing stations and / or treatments. The same is obviously true for the suction table and, in the context of the present invention, a control (for example by variation of the suction power), preferably an individual control, of the constituent elements of the suction, will be preferred. active suction zone (of the active suction assembly). In order to facilitate the understanding of the present description and the claims, we will characterize the active suction assembly comprising at least two suction elements by the term "compartmentalized". Thus, in a preferred embodiment according to the present invention, the active suction assembly (the active suction zone) compartmentalized will comprise at least two, preferably at least three, preferably at least four, for example at minus five suction elements whose power is controllable, preferably individually. A representation of five suction elements (5 fans) is described for illustration in Figure 9 (view from below). The assembly constituted by the active suction zone is therefore an essential component of the suction table, said active suction assembly preferably constituting the lower layer of the table. In an alternative embodiment according to the present invention, this active suction assembly will be attached to the passive layer located directly above, for example by means of clips; for illustrative purposes, this active suction assembly can be integrated into a frame that will preferably be attached to the passive layer directly above, for example by means of clips. In another alternative embodiment according to the present invention, this active suction assembly will be attached to the base of the carriage or to an intermediate element itself attached to the base of the carriage.

In a preferred embodiment according to the present invention, the suction table also comprises a chambered structural layer (passive suction zone / passive suction assembly) situated above the active suction zone (between the active suction zone and substrate), which helps to compartmentalize the suction flows. This structural layer is preferably rigid or semi-rigid. For example, this static layer comprises chambers Ch (or compartments Ch), which are preferably arranged opposite the compartments of the suction zone, in order to improve the control of the power and / or the Homogenization of aspiration within chambers. The dimensions of this structural chamber layer (passive suction zone / passive suction assembly) will be selected according to needs and applications; the widths / lengths of this structural layer (for example a rectangular parallelepiped shaped frame of height "h") will preferably coincide with those of the active suction layer; the heights of this layer (and therefore preferably also chambers) are not critical as long as the layer fulfills its role of homogenization and / or control of the suction power of the suction table; by way of illustration and not limitation we will quote a height "h" of this structural layer (and therefore, preferably, also chambers) between 10 and 50 mm, for example between 15 and 30 mm, for example 20 mm. This structural layer will advantageously comprise at least two, preferably at least three, preferably at least four, for example at least five chambers. The number of chambers may advantageously correspond to the number of compartments of the active suction zone. However, and this is a particular embodiment of the present invention, the structural layer will be removable (for example by means of clips) and can therefore be replaced as needed; this will make it possible to use a number of chambers suitable for the substrates and / or treatments used without having to change the compartmentalised active suction zone. According to an alternative embodiment of the present invention, the number of chambers will remain less than 20, preferably less than 10, so as to avoid a bulk likely to interfere with the performance of the suction zone. By way of illustration, a passive suction zone is shown in FIG. 10 where it can be seen that the passive suction zone comprises five chambers (represented in the figure by rectangles - seen from above); clips can also be seen on all four sides of this frame.

Thus, according to a preferred embodiment according to the present invention, the holding table is a suction table which comprises an active suction assembly divided into two or more suction elements (for example 3, 4, 5, or more ) surmounted by a passive suction assembly compartmentalized in two or more chambers (for example 3, 4, 5, or more), characterized in that, preferably, the number and arrangement of the chambers coincide with the suction elements .

According to an alternative embodiment of the present invention, the surface of the upper part of the chambers will consist of grid (s) whose role will be double: these grids will not only confer to the upper part of the passive suction assembly a flat surface that will improve the flat positioning of the next layer and also help to distribute the flow of suction within each chamber. Thus, a chamber will advantageously comprise at its upper surface at least five, preferably at least ten, for example at least 15 surface sub-chambers delimited by the mesh of the grid. By way of illustration, FIG. 11 describes a structural layer (passive suction zone / passive suction assembly) which comprises 5 chambers, 3 chambers each comprising 24 surface sub-chambers and 2 chambers each comprising 18 surface sub-chambers. .

In a preferred embodiment according to the present invention, the chambered structural layer (passive suction zone / passive suction assembly) also comprises additional homogenization elements of the suction, elements preferably located in places where the Fan positioning may cause suction peaks and / or vortices that could interfere with the proper operation of the treatment stations. By way of illustration, FIG. 11 illustrates a structural layer (passive suction zone / passive suction assembly) which comprises 5 additional suction homogenization elements (in the form of pellets) which are located opposite each other. screw of the center of the suction elements of the active suction zone which makes it possible to overcome any swirling effect and / or suction peak that could generate said suction elements.

Thus, according to a particular embodiment of the present invention, the suction table comprises an active suction assembly (active suction zone) as defined above in combination with a passive suction assembly (zone of suction). passive suction) as defined above so as to control the suction power of the table according to the positioning of the substrates; for illustrative purposes, this not only allows the suction to be balanced as well as possible regardless of the position and the size of the substrates, but also to be able to limit the suction in specific delicate areas, such as when the trolley passes through. below the print heads.

In a particular embodiment according to the present invention, a system for varying the height and / or orientation and / or a translation / rotation of the holding table (preferably the suction table) is integrated device, preferably integrated in the carriage, for example a motorization system and / or cylinder (s). This system (for example this motorization and / or these cylinders) additional can be extremely useful for example, to compensate for faulty print nozzles and / or to increase the resolution of the prints and / or to ensure optimal positioning of the substrates under the treatment stations. By way of illustration and not limitation, mention will be made of a rotation and / or a translation of the table allowing the use of a nozzle to replace a faulty nozzle for performing printing at a precise location of the substrate. By way of illustration and not limitation, use a micrometric transverse motorization for this type of motorization; displacements can therefore advantageously reach a precision of the order of a micron and will preferably be limited to maximum values equivalent to cm in the three dimensions of space. As an illustration and not limitation, Figure 7 illustrates the presence of this element comprising an additional motor; we can indeed see a carriage comprising, a structural base shown in light gray in the figure surmounted by a holding table (in dark gray) and also an intermediate piece between the table and the base constituting this additional motor element, for example a micrometric motorization for moving the table in a direction perpendicular to the direction of travel of the carriage.

In a particular embodiment of the present invention, the table (preferably the suction table) comprises a structural layer consisting of a substrate holding mesh. By way of illustration and not limitation, this mesh may advantageously be used for substrates of low grammage; which makes it possible to avoid any possible "marking" of said substrates during their immobilization on the table. In fact, without wishing to be limited by this explanation, the Applicant believes that the use of a lattice for holding substrates also makes it possible to freeze and maintain the honeycomb layer in its original form while, in the variant of use of suction table, guaranteeing and improving the homogenization of the suction. By way of illustration and not limitation, a retaining lattice is illustrated in FIG. 13. By way of illustration and not limitation, a grid made of stainless steel and / or ceramic fiber may advantageously be used as a lattice. It is obvious that those skilled in the art will be able to select other materials, similar or not to stainless steel and / or ceramic fibers, which will also meet the requirements of the present invention. By way of illustration and not limitation, the mesh of the mesh will be selected from fine meshes to avoid a textural printed paper. By way of illustration and without limitation, the dimensions of a mesh of the mesh will be less than half the size of the cell of the honeycomb, for example less than a quarter of the size of the cell of the honeycomb. By way of illustration and not limitation, the mesh has a thickness of between 1 micron and 1 mm, preferably between 10 and 500 microns, for example between 25 and 300 microns; and / or • a mesh network (square, rectangle, triangular, hexagonal or other) whose largest length on one side of the mesh is between 1 micron and 1 mm, preferably between 50 and 500 microns, by example between 75 and 300 microns; and / or a wire diameter of between 1 micron and 1 mm, preferably between 10 and 200 microns, for example between 25 and 150 microns.

The surface dimensions of the trellis layer will be selected according to the needs and applications and will preferably correspond to the surface of the substrate (or substrates if there are more than one maintained on the same table) plus a margin of security ; we will quote for illustrative dimensions (1 / L) in mm of the order of 760/1070. The widths / lengths of this mesh will preferably coincide with those of the honeycomb structural layer, and optionally with those of the passive suction layer, and optionally also with those of the active suction layer.

The trellis will preferably consist of a network of regular and / or identical meshes.

The combination of a lattice as defined above fixed on the honeycomb structural layer (as described above) is a preferred embodiment according to the present invention for maintaining the substrates on the table. (preferably the suction table). Indeed, the use of a structural layer of honeycomb type (as described above) and the lattice makes it possible to overcome the suction soles of the prior art such as for example those described above ( soles usually made mainly of metal and / or polytetrafluoroethylene (also known as Teflon) and drilled with multitudes of holes); indeed, the honeycomb structural layer (as described above) on which is deposited / fixed a lattice can directly serve as a support sole for the substrates and thus allow the table to exercise suction and therefore the maintenance of said substrates on this sole.

In a particular embodiment of the present invention, the mesh is removably attached to the table which allows to replace and / or change according to, for example, the types of substrates used. Any removable fastening system may advantageously be used; we will cite for illustrative attachment a type of toggle and / or snap type. In an alternative embodiment the removable fastening system fixed the mesh directly on the honeycomb layer.

According to an alternative embodiment of the present invention, optional masking areas may be added to the mesh, for example to prevent aspiration into areas without a substrate.

In a particular embodiment of the present invention, the table (preferably the suction table) comprises an additional optional layer consisting of a filter which makes it possible to further improve the efficiency of the table by making it possible to trap the radiation while avoiding that they do not reflect on the table. By way of illustration and not limitation, this filter is an anti-UV filter.

The surface dimensions of the filter layer will be selected according to needs and applications and will preferably correspond to the surface of the substrate (or substrates if there are more than one maintained on the same table) plus a margin of safety ; we will quote for illustrative dimensions (1 / L) in mm of the order of 760/1070. The widths / lengths of this filter will preferably coincide with those of the mesh and / or the honeycomb structural layer, and optionally with those of the passive suction layer, and optionally also with those of the suction layer. active.

In an alternative embodiment according to the present invention, this filter layer will be placed directly below and / or above the honeycomb layer and / or the lattice.

It may happen that height differences appear between certain points of the surface of the aforementioned layers in the table, the said differences thus generating differences in height which can reach in some places an order of magnitude of ten (s), or even a hundred ( s) microns. It is best to prevent these deviations from affecting the quality and / or performance of the processing stations (especially printing stations). In addition, in case of large deviations, there may be a risk of contact between certain points of the upper layer of the table and the treatment station, for example the printheads which could thus be damaged.

Thus, in a particular embodiment of the present invention, the table (preferably the suction table) comprises optional additional elements (which we will call flatness sub-layer elements) arranged in precise locations between two of the above-mentioned layers. mentioned to improve the homogeneity / flatness of the table supporting the substrate (s).

This additional optional sub-layer will thus level the layers above and / or below it and make the final layer of the table flat. By way of illustration and not limitation, this underlayer of flatness will comprise metal plates (for example aluminum) which may for illustrative purposes be arranged: • between the active suction assembly and the passive suction assembly (structural layer with chambers), • or between the passive suction assembly (chambered bed) and the honeycomb layer.

FIG. 7 thus illustrates a variant of carriage according to the present invention, said carriage comprising a structural base represented in light gray in the figure surmounted by a table (in dark gray) for supporting the substrates, V-shaped wheels under the base (for V-guide - fixed rail) and slider pads; This Figure 7 also schematically illustrates a conductive contact element (sliding electrical contact) which provides the electrical connection between the current rail (described below) and the carriage.

As a summary and not necessarily illustrated in the figures, the carriage according to the present invention advantageously comprises a holding table comprising a honeycomb structural layer, and a frame of structure, preferably made of aluminum, the said frame being able to make the basic office of the trolley, and / or • an element of the guidance system, for example a V-shaped guide element (for example V-shaped wheels), and / or • an element of the slide (s) , for example the sliding element (for example the pad (s)), and / or a control element of the carriage, for example a programmable automaton, and / or a motorization system making it possible to orient the table in the 3 dimensions of the space, and / or • a suction table, and / or • an active suction assembly, and / or • a passive suction assembly, and / or • a lattice, and / or • a filter layer, and / or • an underlayer of flatness, and / or elements of the displacement sensors, and / or • protection elements of the carriages as described below.

In a particular embodiment of the present invention, the carriage will also include a substrate-lifting device. Indeed, in certain situations and, in particular in the field of printing for printed electronics, it is necessary to use a particular system for feeding and removing the substrates to be treated, the said system making it necessary to integration into the carriage of an autonomous device for lifting substrates. Any autonomous lifting device may advantageously be used; we will mention for illustrative purposes a device comprising cylinders arranged on the carriage, for example arranged in the table. Thus, this device will both • receive the substrates to be treated at a sufficient elevation above the table during the supply of substrate to be treated; and • to position said treated substrates at a sufficient elevation above the table, the elevation being dictated by the particular system for feeding and removing substrates.

In a particular embodiment of the present invention, the structure of the carriage comprises at least one protection which makes it possible to avoid damaging the other components of the carriage in the event of an unexpected collision between two carriages. This protection will therefore ideally be placed on the front edge or on the rear edge (in the direction of travel) of the carriage or, preferably, on the front and rear edges of the carriage. Since the device according to the present invention makes it possible to control each of the carriages individually and thus to precisely control their positions and speeds at all times. these protections are not essential. However, in order to mitigate the potential risks related for example to a power failure and / or a failure in terms of data transmission (instructions) to the truck, this type of protection will be preferred. Any protection to minimize and / or eliminate the problems that would generate an impact between trolleys can advantageously be used in the context of the present invention; an illustrative and non-limiting example of a bumper type shock absorbing protection springs or deformation.

An optional feature of the substrate transport device of the present invention is therefore the use of a carousel-type substrate conveyor for guiding and moving the substrates through the processing stations, said conveyor comprising trolleys which hold the substrates in place. a stationary position (for example flat) and which move on a fixed rail which forms a transport loop, characterized in that the device comprises a siding for the carriages, said track being removably connected to the rail of conveyor and thus allowing to park and / or to add and / or to remove one or more carriages. As an illustration and not limitation, this type of siding is similar to what is used in the railway field, with a switch to divert certain trains and / or wagons. By way of illustration and not limitation, the carriage can be brought by translation perpendicular to the transport loop to said siding by any other appropriate device. This siding may advantageously constitute a dead end and / or a bypass loop on the transport loop and be located at any appropriate location of the transport loop, with an identical entry point and exit and / or different on the loop

This siding is also very useful because it allows any maintenance act on the trolleys; the maintenance and / or replacement of one or more components of the table as described above, for example the protection and / or the lattice and / or the honeycomb layer, will be mentioned by way of illustration and without being limiting. and / or an active element of the suction (for example a fan); - The maintenance and / or replacement of one or more components of the active part (or the passive part depending on the configuration) of the linear actuator; Γmaintenance and / or replacement of one or more components of displacement sensors; the addition and / or removal of trolley (s) on the transport loop.

An optional feature of the substrate transport device of the present invention is therefore the use of a carousel-type substrate conveyor for guiding and moving the substrates through the processing stations, said conveyor comprising trolleys which hold the substrates in an immobile position (for example flat) and which move on a fixed rail which forms a transport loop, characterized in that the device comprises a bypass path for the carriages, said path being releasably connected to the conveyor rail and thus making it possible to provide any type of additional treatment of the substrate. By way of illustration and not limitation, we will mention a process of turning the substrate on the table and / or a coating station often called gilding station ("foil"), as described above in the description; however, it should be noted that these treatments and / or processes could also occur on the main transport loop. This branch path may advantageously constitute a bypass loop on the transport loop and be located at any appropriate location of the transport loop, with an identical point of entry and exit and / or advantageously different on the loop; for example, for a substrate reversal process a bypass loop may advantageously be arranged between the loading and unloading stations substrates.

In a particular embodiment of the present invention, the substrate transport device comprises at least one trolley equipped with a maintenance tray (for example a cleaning plate and / or a setting plate). This maintenance trolley (for example a "cleaning" and / or "adjustment" trolley) can advantageously be in idle mode on a siding as defined above, and then brought into active mode on the transport trolley. in order to carry out any act of maintenance necessary for the proper functioning of the treatment stations. This trolley cleaner and / or adjustment is very useful because it allows to perform any act of maintenance on treatment stations; we will quote for illustrative and not limiting - the maintenance and / or the replacement of one or more components of the treatment stations, for example the cleaning of printing nozzles, etc - any act of adjustment of the components of the treatment stations .

In a particular embodiment of the present invention, the substrate transport device comprises at least one carriage equipped with a diagnostic tray. This diagnostic trolley can advantageously be in idle mode on a siding as defined above to then be brought into active mode on the transport loop so as to perform any act of diagnosis to verify the proper operation of the posts treatment.

We will cite as an illustration and not limited to an analysis of the printheads.

In an alternative embodiment according to the present invention, a carriage may comprise both a diagnostic plate and a maintenance plate.

A feature of the present invention is therefore the use of a substrates conveyor (preferably of the carousel type) for guiding and moving the substrates through the treatment stations, said conveyor comprising trolleys which hold the substrates in a stationary position (for example flat) and which move along the transport path (for example on a fixed rail which allows to move each carriage / substrate assembly on the rail).

In a preferred embodiment according to the present invention, the substrate transport carriage can therefore move autonomously along the transport path (of the transport loop) by means of an active motor element ensuring its displacement, for example the linear motor described above. This embodiment involves the need to power the mobile cart with energy and also to ensure the transfer of information, preferably the bidirectional transfer of information (digital information preferences).

Any energy supply solution of the mobile carriage can advantageously be used in the context of the present invention. In a preferred embodiment according to the present invention, the power supply of the mobile carriage comprises a set of electrically conductive rails which are preferably fixed along the transport path and a sliding contact element which is preferably movable. and fixed on the cart. As an illustration and not limitation, Figures 1 and 6 illustrate said conductive rails; all along the transport loop in Figure 1 and on the left side of Figure 6, as already described above. In Figure 6, it can be seen that the power supply system is fixed on the sole; in Figure 1, it is fixed over the entire length of the sole and then on the supporting structure of the device (lightened / hollowed) transport according to the present invention. By way of illustration and without being limiting, FIG. 7 illustrates on the left-hand part of the figure a kind of comb corresponding to a simplified representation of the sliding contact element serving to supply energy to the carriage.

Any solution for transferring information from / to the mobile carriage can advantageously be used in the context of the present invention. In a preferred embodiment according to the present invention, a radiating cable system is used. As an illustration and not limitation, Figure 6 illustrates the cable radiating on the left side of the figure; in this illustration it is placed above the conductor rails.

In an alternative embodiment according to the present invention, the set of conducting rails (for example of the "third rail" type) ensures the transmission (possibly bidirectional): 1. of the (electrical) energy supplying the active driving element of the trolley and computer control means of the transport device; and / or 2. electrical safety signals (global emergency stop and individual error signals of each mobile carriage) ensuring the stopping of all the mobile carriages in the event of a fault, for example in the event of a defect in one or more trolleys and / or in case of defect of other elements of the transport device and / or the printing machine; and / or 3. electrical signals allowing precise synchronization of the mobile carriages with each other and / or with a centralized computer control means. As an illustration, this precise synchronization can be obtained by using: a centralized clock, and / or centralized start / stop cycle signals. As an illustration, this precise synchronization not only makes it possible to optimize the travel cycle times of the carriages and therefore of the treatment of the substrates; but it also allows, in some particular embodiments according to the present invention, to organize simultaneous stops of two carriages for respectively their loading and unloading substrate (s).

In a preferred embodiment according to the present invention, the power supply of the mobile carriage thus comprises at least one sliding contact element fixed on the carriage, said sliding contact on the set of conductive rails described above. By way of illustration and not limitation, FIG. 7 illustrates on the left-hand part of the figure a sort of comb corresponding to a simplified representation of the sliding contact element serving to supply energy to the carriage, said contact being fixed to the structure of the cart. In a preferred embodiment according to the present invention, each mobile carriage is equipped with several sliding contacts on the set of conductive rails, said sliding contacts forming an assembly fixed on each carriage.

Each truck is thus fed and synchronized continuously throughout the transport carousel without the need to be connected by means of cables to a centralized supply system which represents a considerable advantage of the supply system of the transport device according to the invention. the present invention.

Thus, in a preferred embodiment according to the present invention, the substrate transport trolley can therefore move autonomously along the transport path (of the transport loop) which implies the need to ensure the transfer of information to the carriage, preferably the bidirectional transfer of information to / from the carriage (preferably digital information).

As already indicated, any transfer solution, preferably bi-directional transfer, of contactless information to / from the mobile carriage may advantageously be used in the context of the present invention, such as for example a system for the radio transmission of information as shown in FIG. 6, in particular a radiating cable.

In a preferred embodiment according to the present invention, the information supply of the mobile carriage is carried out without contact, for example by using the aforementioned radiating cable.

In a preferred embodiment according to the present invention, the Applicant has developed a contactless communication system for the transfer, preferably the bidirectional transfer, of information to / from the carriage, by way of illustration, we will mention the choice of radio waves whose transmission is provided by a technology selected from: • The radiating cable, and / or • The waveguide, and / or • The antennas.

In a preferred embodiment according to the present invention, the preferred non-contact communication solution for transferring information to and / or from the mobile carriage comprises a fixed radiating cable along the transport path (of the transport loop) for the transmission of the radio waves in communication with at least one radio wave receiving antenna placed on each of the carriages.

This type of contactless communication allows, as an illustration, the setting of the trolley travel cycle, said parameterization being obtained from a computer control means. By way of illustration, the chosen communication means of this parameterization is a wireless communication via an electromagnetic radiating cable placed all along the transport path (for example of the carousel).

Any wireless information transmission technology between the mobile carriage and the fixed part of the device according to the present invention may advantageously be used. We will cite LTE and / or LTE-advanced technology (current and future generation (3G / 4G) mobile telephony standards and / or WiMAX (Worldwide Interoperability for Microwave Access) technology, and / or or Wi-Fi technology (abbreviation for Wireless Fidelity), and / or femtocell technology, and / or Bluetooth wireless technology, and / or DECT technology (acronym for Digital Enlianced Cordiess Telecommunication).

In an alternative embodiment according to the present invention, the transmission of the wireless information between the mobile carriage and the fixed part of the device according to the present invention may advantageously be carried out by means of the Li-Fi ("light fidelity") technology. , using the principle of transmission of information by light, for example by modulating the transmission of light very quickly; any type of current or future adapted lamps can advantageously be used (for example LED lamps).

In an alternative embodiment according to the present invention, the transfer of wireless information between the mobile carriage and the fixed part of the device according to the present invention may also be carried out by means of laser technology.

In an alternative embodiment according to the present invention, the transfer technology (bidirectional) of the non-contact information between the mobile carriage and the fixed part of the transport device (for example the radiating cable) will be based on a so-called "short" solution. distance 'so as to prevent the risk of interference with the immediate environment of the transport device; we will quote for illustrative and not limiting the technology of communication in near field (CCP - also known in English by Near Field Communication, NFC).

In a preferred embodiment according to the present invention, the preferred solution of contactless communication for transferring information from the transport loop to the trolleys comprises an information transmitting means which is a fixed element along the trunk loop. transport (for example a radiating cable) and, on each mobile carriage, a means for receiving said information which is a movable element fixed on each of the carriages (for example an antenna), element preferably electromagnetically coupled to the fixed element mentioned above along the loop (preferably a radiating cable). This solution has the advantage of: - having a limited radiating field close to the cable and thus generating little electromagnetic interference, and / or - being immune to the electromagnetic disturbances that can be generated by the external environment and / or generated by the mobile carriage itself due to the possible use of electromagnetic displacement means (linear motor, etc.).

In a preferred embodiment according to the present invention, the communication of information is bidirectional. In this variant, the preferred bidirectional communication solution comprises an information transmission and reception means which is a fixed element along the transport path / of the transport loop (for example a radiating cable) and, on each carriage mobile, a means for receiving and transmitting information (for example an antenna), preferably a magnetically coupled element to the aforementioned fixed element along the path / loop (preferably a rayo-ray cable). This solution has the advantage, in addition to the parameterization, of allowing the feedback of information from each of the mobile carriages to the computer "control means" of the claimed device, for example information relating to the movements of the carriage (speed, position, acceleration, deceleration) and / or relative to various and varied statuses (eg error messages, information from sensors, etc.). The transmission, preferably bi-directional, of information between the control means (for example a computer) and the means for transmitting and receiving information of the claimed device (for example the fixed element along the path / loop preferably the radiating cable) can be wired and / or non-contact using any of the aforementioned non-contact technologies.

In a preferred embodiment according to the present invention, the claimed device also comprises a set of sensors and protections ensuring the safe movement of mobile carriages, for example distance sensors. As an illustration, the presence on the carriages of a distance sensor for detecting the carriage which precedes it along the transport path and / or a distance sensor for detecting the carriage which follows it along the transport path; thus each carriage can autonomously manage its position relative to the other carriages and thus adapt its position, and / or its speed, and / or its deceleration and / or its acceleration.

Any type of position detection sensor may advantageously be used in the context of the present invention; by way of illustration and not limitation, laser sensors will be preferred. The use of said sensors will allow each carriage; • to be independent and thus guarantee its autonomy; • to avoid colliding with the trolleys in front and / or behind and thus ensure compliance with operations (acceleration, continuous speeds, etc.)

In an alternative embodiment of the present invention, each carriage comprises at least one detection sensor as described above, said sensor being positioned at any appropriate place on the front and / or rear edge of the carriage (in the of the carriage), for example in the center of the edge.

In a particular embodiment of the present invention, each carriage comprises at least one detection sensor as described above, said sensor being positioned on the front and / or rear edge of the carriage (in the direction of travel of the carriage) and characterized in that its position on the edge of the carriage is located close to and / or on the outer corner of the edge (the term "outer" is used with respect to the rotation around the loop); for example, for a carriage whose edge (front or rear) is of length X, the sensor will be disposed on the edge (front or rear) at a distance from the outer corner less than X / 2, less than X / 4, of preferably less than X / 8.

In a preferred embodiment of the present invention, each carriage will comprise at least one detection sensor as described above on the front edge of the carriage, and at least one detection sensor as described above on the edge. rear of the cart.

In an alternative embodiment of the present invention, the wave emitted by the sensor positioned on the front / rear edge of a carriage forms any appropriate angle with respect to said front / rear edge of the carriage, for example an angle of 90 degrees.

In a particular embodiment of the present invention, the wave emitted by the sensor positioned on the front / rear edge of a carriage forms an angle with respect to said front / rear edge of the carriage between 30 and 90 degrees, for example less than 90 degrees, between 35 and 55 degrees, for example between 40 and 50 degrees, for example of the order of 45 degrees.

The present invention also relates to the use of the substrate holding device and / or the substrate transport device and / or the substrate transport method according to any one of the embodiments already described in a printing machine comprising at least one printing station, preferably at least two different non-contact printing stations in series (preferably digital inkjet printing), and at least one drying station (for example along the transport path ); and, in particular, said use in a printing machine also comprising a coating station (for example by depositing an additional coating, for example gilding or other material) applying / pressing a sheet of said coating on selected areas of the substrate (eg, having an adhesive deposit in a predetermined pattern) so as to adhere to the selected areas the desired portion of the sheet of said coating.

The present application describes various technical features and advantages with reference to the figures and / or various embodiments. Those skilled in the art will appreciate that the technical features of a given embodiment may in fact be combined with features of another embodiment unless the reverse is explicitly mentioned or it is evident that these features are incompatible. In addition, the technical features described in a given embodiment can be isolated from the other features of this mode unless the opposite is explicitly mentioned.

It should be obvious to those skilled in the art that the present invention allows embodiments in many other specific forms without departing from the scope of the invention as claimed. Therefore, the present embodiments should be considered by way of illustration, but may be modified within the scope defined by the scope of the appended claims, and the invention should not be limited to the details given above.

Claims (27)

1. Device for holding substrates in a printing machine comprising one or more processing stations including at least one printing station, said device comprising a table for holding the substrate in a stationary position relative to the table during the (s) treatment (s) of the substrate, characterized in that the holding table comprises a structural layer honeycomb. 2. Device for maintaining substrates according to the preceding claim characterized in that the honeycomb structural layer has a thickness "e" of between 1 and 100 mm, for example between 5 and 30 mm, preferably between 5 and 15 mm. mm. 3. Device for maintaining substrates according to any one of the preceding claims, characterized in that the cells of the honeycomb structural layer have a size of between 10 microns and 10 mm, for example between 1 and 8 mm, of preferably between 2 and 5 mm. 4. substrate holding device according to any one of the preceding claims, characterized in that the thickness of the cell walls of the structural honeycomb layer is between 0.5 micron and 5 mm, for example between 10 and 200 microns, preferably between 30 and 100 microns. 5. substrate holding device according to any one of the preceding claims characterized in that the honeycomb structural layer is regularly hexagonal paving. 6. substrate holding device according to any one of the preceding claims characterized in that the structural honeycomb layer is aluminum. 7. substrate holding device according to any one of the preceding claims characterized in that the holding table comprises a structural layer consisting of a lattice for holding the substrates. 8. substrate holding device according to the preceding claim characterized in that the mesh is a grid made of stainless steel and / or ceramic fiber. 9. substrate holding device according to any one of claims 7 or 8 characterized in that the mesh has a thickness between 1 micron and 1 mm, preferably between 10 and 500 microns, for example between 25 and 300 microns. 10. substrate holding device according to any one of claims 7 to 9 characterized in that the lattice has a mesh network (for example square, rectangle, triangular, hexagonal or other) whose largest length of a side of the mesh is between 1 micron and 1 mm, preferably between 50 and 500 microns, for example between 75 and 300 microns. 11. Device for holding substrates according to any one of claims 7 to 10 characterized in that the mesh has a wire diameter of between 1 micron and 1 mm, preferably between 10 and 200 microns, for example between 25 and 150 microns. 12. substrate holding device according to any one of claims 7 to 11 characterized in that the mesh is fixed on the structural honeycomb layer. 13. substrate holding device according to any one of the preceding claims characterized in that the honeycomb structural layer and the lattice are removably attached to the holding table. 14. Device for holding substrates according to any preceding claim characterized in that the device incorporates a system for varying the height and / or orientation and / or a translation / rotation of the holding table (preferably the suction table), for example a motorization system and / or cylinder (s). 15. substrate holding device according to any one of the preceding claims characterized in that the substrate holding table in a stationary position relative to the table during the treatment of the substrate is a suction table comprising an active suction assembly (active suction zone) in combination with a passive suction unit (passive suction zone) which comprises the honeycomb structural layer. A substrate transport device in a printing machine comprising one or more processing stations including at least one printing station, along a transport path from at least one input area providing the printable substrates and / or printed, to at least one output area receiving the treated substrates, comprising; A substrate conveyor for guiding and moving the substrates through the treatment stations, said conveyor comprising carts which hold the substrates in an immobile position and which move along the transport path carrying the substrates, the substrate transport device being thus adapted to move each carriage along the transport path and characterized in that 1. the substrate transport device comprises a motorization system which allows the carriage to move along the transport path, 2 the carriage comprises a table for holding the substrate in a stationary position relative to the table, along the transport path during the treatment (s) of the substrate, and 3. the holding table is that of the maintaining according to any one of the preceding claims. 17. Device for transporting substrates according to the preceding claim characterized in that the transport path is a transport loop, in that the conveyor comprises a fixed rail which forms the said transport loop and in that the carriages which maintain the substrates in a stationary position move on said rail carrying the substrates, the substrate transport device being thus adapted to move each carriage on the rail along the transport loop and in that substrates comprises a base on which at least a portion of the rail is fixed and whose surface is preferably flat, and 2. the substrate transport device comprises a motorization system which allows the carriage to move on the fixed rail. 18. Device for transporting substrates according to any one of claims 16 and 17, characterized in that the motorization system is a linear motorization system based on the principle of an electromagnetic interaction between a coil assembly (primary assembly) and a pathway. of permanent magnets (secondary assembly), and in that the primary motor unit of the linear motorization is part of the mobile carriage and the secondary assembly consists of a magnet path (magnetic path), the said path being fixed along the transport path, for example on the fixed rail and / or forming an integral part of the fixed rail and / or being fixed on the base and / or forming an integral part of the base and / or being fixed on a rigid holding structure rail and / or integral part of this rigid structure. 19. Device for transporting substrates according to any one of claims 17 and 18 characterized in that the base is made of marble and / or granite and / or granite and / or cast iron. 20. Device for transporting substrates according to any one of claims 17 to 19 characterized in that the guide system of the carriage on the fixed rail comprises at least a pair of guide elements disposed on either side of the rail (For example wheels), each pair of guide elements (for example a pair of wheels) comprising a mechanism for guiding the carriage both in the straight lines and in the turns, for example a holding bar which connects the wheels. two guide elements between them (for example the two wheels together), said support bar comprising a pivoting axis connected to the carriage to ensure optimal guidance of the carriage along the rail and, in particular along the bends formed by the transport loop. 21. Device for transporting substrates according to the preceding claim characterized in that the guide system is a V-guide system. 22. Device for transporting substrates according to any one of claims 17 to 21 characterized in that it comprises at least one guide rail consisting of a rail and a guide member fixed to the carriage (preferably two rails arranged on either side of the fixed rail and two guide elements), and in that the rail of the slide is an integral part of the fixed rail and / or is fixed on the fixed rail and / or is fixed on the rail. base of the fixed rail and / or is an integral part of the base of the fixed rail and / or is fixed to the supporting structure of the fixed rail and / or is an integral part of the supporting structure of the fixed rail, and in that the total length of the rail The slider is selected to cover the entire space below the printing stations of the transport loop. 23. Device for transporting substrates according to the preceding claim characterized in that the width of the initial end (the input in the direction of movement of the carriage) eù'or the width of the end end (the output in the direction the movement of the carriage) of the rail of the rail is less than the average width of said rail. 24. Device for transporting substrates according to any one of claims 16 to 23 characterized in that it comprises a power supply device of the movable carriage comprising a set of electrically conductive rails along the path of transport and a sliding contact element fixed on the carriage. 25. Device for transporting substrates according to any one of claims 16 to 24 characterized in that it comprises an information transfer device from / to the mobile cart without contact comprising a cable system radiating along the path of transport. 26. Use of the substrate holding device and / or the substrate transport device according to any one of the preceding claims in a printing machine comprising at least two different non-contact printing stations in series (preferably printing digital ink jet) and at least one drying station. 27. Use of the substrate holding device and / or the substrate transport device according to the preceding claim in a printing machine also comprising a coating station (for example by depositing an additional coating, for example gilding or other material) applying / squeezing a sheet of said coating onto selected areas of the substrate (eg having an adhesive deposit in a predetermined pattern) so as to adhere to the selected areas the desired portion of the sheet of said coating .